Step Area with Gaps
The Step Area series uses perpendicular vertical and horizontal lines to connect data points and shades the area under these lines. If a point's value is null, the series draws a gap.
Only null point values result in gaps. undefined values are ignored. Multiple 0 values may look like a gap, but if series points are visible, you can see them in this gap. If you want to remove gaps caused by null values, enable the ignoreEmptyPoints property.
www.wikipedia.org
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import React from 'react';
import Chart, {
ArgumentAxis,
Series,
CommonSeriesSettings,
Label,
Legend,
Export,
Point,
} from 'devextreme-react/chart';
import { medalsInfo } from './data.js';
class App extends React.Component {
render() {
return (
<Chart
title="France Olympic Medals"
dataSource={medalsInfo}
id="chart"
>
<Series valueField="gold" name="Gold Medals" color="#ffd700" />
<Series valueField="silver" name="Silver Medals" color="#c0c0c0" />
<CommonSeriesSettings
argumentField="year"
type="steparea"
>
<Point visible={true} />
</CommonSeriesSettings>
<ArgumentAxis>
<Label format="decimal" />
</ArgumentAxis>
<Export enabled={true} />
<Legend
verticalAlignment="bottom"
horizontalAlignment="center"
/>
</Chart>
);
}
}
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(
<App />,
document.getElementById('app'),
);
<!DOCTYPE html>
<html>
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/22.2.6/css/dx.light.css" />
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import("./index.js");
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
#chart {
height: 440px;
width: 100%;
}
export const medalsInfo = [{
year: 1904,
gold: null,
silver: null,
}, {
year: 1908,
gold: 5,
silver: 5,
}, {
year: 1912,
gold: 7,
silver: 4,
}, {
year: 1916,
gold: null,
silver: null,
}, {
year: 1920,
gold: 9,
silver: 19,
}, {
year: 1924,
gold: 13,
silver: 15,
}, {
year: 1928,
gold: 6,
silver: 10,
}, {
year: 1932,
gold: 10,
silver: 5,
}, {
year: 1936,
gold: 7,
silver: 6,
}, {
year: 1940,
gold: null,
silver: null,
}, {
year: 1944,
gold: null,
silver: null,
}, {
year: 1948,
gold: 10,
silver: 6,
}, {
year: 1952,
gold: 6,
silver: 6,
}, {
year: 1956,
gold: 4,
silver: 4,
}, {
year: 1960,
gold: null,
silver: 2,
}, {
year: 1964,
gold: 1,
silver: 8,
}, {
year: 1968,
gold: 7,
silver: 3,
}, {
year: 1972,
gold: 2,
silver: 4,
}, {
year: 1976,
gold: 2,
silver: 3,
}, {
year: 1980,
gold: 6,
silver: 5,
}, {
year: 1984,
gold: 5,
silver: 7,
}, {
year: 1988,
gold: 6,
silver: 4,
}, {
year: 1992,
gold: 8,
silver: 5,
}, {
year: 1996,
gold: 15,
silver: 7,
}, {
year: 2000,
gold: 13,
silver: 14,
}, {
year: 2004,
gold: 11,
silver: 9,
}, {
year: 2008,
gold: 7,
silver: 16,
}, {
year: 2012,
gold: 11,
silver: 11,
}, {
year: 2016,
gold: 18,
silver: 18,
}];
window.config = {
transpiler: 'plugin-babel',
meta: {
'devextreme/localization.js': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
},
defaultExtension: 'js',
map: {
'react': 'npm:react@17.0.2/umd/react.development.js',
'react-dom': 'npm:react-dom@17.0.2/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.8.1/prop-types.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@22.2.6/cjs',
'devextreme-react': 'npm:devextreme-react@22.2.6',
'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.5.20/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.1.72/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.43/dist/dx-gantt.js',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.11',
'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js',
// Prettier
'prettier/standalone': 'npm:prettier@2.8.4/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.4/parser-html.js',
},
packages: {
'devextreme': {
defaultExtension: 'js',
},
'devextreme-react': {
main: 'index.js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:@devextreme/runtime@3.0.11/inferno/package.json',
],
babelOptions: {
sourceMaps: false,
stage0: true,
react: true,
},
};
System.config(window.config);